package com.pzhu.myblog.common.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Component;

import java.util.*;
import java.util.concurrent.TimeUnit;

/**
 * redis 工具类
 *
 * @Author Guo Huaijian
 * @Date 2020/2/13 12:35
 */
@SuppressWarnings(value = { "unchecked", "rawtypes" })
@Component
public class RedisUtils {

        @Autowired
        public RedisTemplate redisTemplate;

        /**
         * 缓存基本的对象，Integer、String、实体类等
         *
         * @param key 缓存的键值
         * @param value 缓存的值
         * @return 缓存的对象
         */
        public <T> ValueOperations<String, T> setCacheObject(String key, T value)
        {
            ValueOperations<String, T> operation = redisTemplate.opsForValue();
            operation.set(key, value);
            return operation;
        }

        /**
         * 缓存基本的对象，Integer、String、实体类等
         *
         * @param key 缓存的键值
         * @param value 缓存的值
         * @param timeout 时间
         * @param timeUnit 时间颗粒度
         * @return 缓存的对象
         */
        public <T> ValueOperations<String, T> setCacheObject(String key, T value, Integer timeout, TimeUnit timeUnit)
        {
            ValueOperations<String, T> operation = redisTemplate.opsForValue();
            operation.set(key, value, timeout, timeUnit);
            return operation;
        }

        /**
         * 获得缓存的基本对象。
         *
         * @param key 缓存键值
         * @return 缓存键值对应的数据
         */
        public <T> T getCacheObject(String key)
        {
            ValueOperations<String, T> operation = redisTemplate.opsForValue();
            return operation.get(key);
        }

        /**
         * 删除单个对象
         *
         * @param key
         */
        public void deleteObject(String key)
        {
            redisTemplate.delete(key);
        }

        /**
         * 删除集合对象
         *
         * @param collection
         */
        public void deleteObject(Collection collection)
        {
            redisTemplate.delete(collection);
        }

        /**
         * 缓存List数据
         *
         * @param key 缓存的键值
         * @param dataList 待缓存的List数据
         * @return 缓存的对象
         */
        public <T> ListOperations<String, T> setCacheList(String key, List<T> dataList)
        {
            ListOperations listOperation = redisTemplate.opsForList();
            if (null != dataList)
            {
                int size = dataList.size();
                for (int i = 0; i < size; i++)
                {
                    listOperation.leftPush(key, dataList.get(i));
                }
            }
            return listOperation;
        }

        /**
         * 获得缓存的list对象
         *
         * @param key 缓存的键值
         * @return 缓存键值对应的数据
         */
        public <T> List<T> getCacheList(String key)
        {
            List<T> dataList = new ArrayList<T>();
            ListOperations<String, T> listOperation = redisTemplate.opsForList();
            Long size = listOperation.size(key);

            for (int i = 0; i < size; i++)
            {
                dataList.add(listOperation.index(key, i));
            }
            return dataList;
        }

        /**
         * 缓存Set
         *
         * @param key 缓存键值
         * @param dataSet 缓存的数据
         * @return 缓存数据的对象
         */
        public <T> BoundSetOperations<String, T> setCacheSet(String key, Set<T> dataSet)
        {
            BoundSetOperations<String, T> setOperation = redisTemplate.boundSetOps(key);
            Iterator<T> it = dataSet.iterator();
            while (it.hasNext())
            {
                setOperation.add(it.next());
            }
            return setOperation;
        }

        /**
         * 获得缓存的set
         *
         * @param key
         * @return
         */
        public <T> Set<T> getCacheSet(String key)
        {
            Set<T> dataSet = new HashSet<T>();
            BoundSetOperations<String, T> operation = redisTemplate.boundSetOps(key);
            Long size = operation.size();
            for (int i = 0; i < size; i++)
            {
                dataSet.add(operation.pop());
            }
            return dataSet;
        }

        /**
         * 缓存Map
         *
         * @param key
         * @param dataMap
         * @return
         */
        public <T> HashOperations<String, String, T> setCacheMap(String key, Map<String, T> dataMap)
        {
            HashOperations hashOperations = redisTemplate.opsForHash();
            if (null != dataMap)
            {
                for (Map.Entry<String, T> entry : dataMap.entrySet())
                {
                    hashOperations.put(key, entry.getKey(), entry.getValue());
                }
            }
            return hashOperations;
        }

        /**
         * 获得缓存的Map
         *
         * @param key
         * @return
         */
        public <T> Map<String, T> getCacheMap(String key)
        {
            Map<String, T> map = redisTemplate.opsForHash().entries(key);
            return map;
        }

        /**
         * 获得缓存的基本对象列表
         *
         * @param pattern 字符串前缀
         * @return 对象列表
         */
        public Collection<String> keys(String pattern)
        {
            return redisTemplate.keys(pattern);
        }
}
